package/utils/busybox/patches/007-upstream_zcat_no_ext_fix.patch

   1 From 28dd64a0e1a9cffcde7799f2849b66c0e16bb9cc Mon Sep 17 00:00:00 2001
   2 From: Denys Vlasenko <vda.linux@googlemail.com>
   3 Date: Fri, 10 Jan 2014 14:06:57 +0100
   4 Subject: [PATCH] libarchive: open_zipped() does not need to check extensions
   5  for e.g. gzip
   6
   7 We only need to check for signature-less extensions,
   8 currently only .lzma. The rest can be happily autodetected.
   9
  10 This fixes "zcat FILE_WITHOUT_GZ_EXT" case, among others.
  11
  12 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
  13 (cherry picked from commit 7c47b560a8fc97956dd8132bd7f1863d83c19866)
  14 Signed-off-by: Mike Frysinger <vapier@gentoo.org>
  15 ---
  16  archival/libarchive/open_transformer.c | 23 +++++++++++------------
  17  1 file changed, 11 insertions(+), 12 deletions(-)
  18
  19 --- a/archival/libarchive/open_transformer.c
  20 +++ b/archival/libarchive/open_transformer.c
  21 @@ -182,27 +182,26 @@ int FAST_FUNC setup_unzip_on_fd(int fd,
  22
  23  int FAST_FUNC open_zipped(const char *fname)
  24  {
  25 -       char *sfx;
  26         int fd;
  27
  28         fd = open(fname, O_RDONLY);
  29         if (fd < 0)
  30                 return fd;
  31
  32 -       sfx = strrchr(fname, '.');
  33 -       if (sfx) {
  34 -               sfx++;
  35 -               if (ENABLE_FEATURE_SEAMLESS_LZMA && strcmp(sfx, "lzma") == 0)
  36 -                       /* .lzma has no header/signature, just trust it */
  37 +       if (ENABLE_FEATURE_SEAMLESS_LZMA) {
  38 +               /* .lzma has no header/signature, can only detect it by extension */
  39 +               char *sfx = strrchr(fname, '.');
  40 +               if (sfx && strcmp(sfx+1, "lzma") == 0) {
  41                         open_transformer_with_sig(fd, unpack_lzma_stream, "unlzma");
  42 -               else
  43 -               if ((ENABLE_FEATURE_SEAMLESS_GZ && strcmp(sfx, "gz") == 0)
  44 -                || (ENABLE_FEATURE_SEAMLESS_BZ2 && strcmp(sfx, "bz2") == 0)
  45 -                || (ENABLE_FEATURE_SEAMLESS_XZ && strcmp(sfx, "xz") == 0)
  46 -               ) {
  47 -                       setup_unzip_on_fd(fd, /*fail_if_not_detected:*/ 1);
  48 +                       return fd;
  49                 }
  50         }
  51 +       if ((ENABLE_FEATURE_SEAMLESS_GZ)
  52 +        || (ENABLE_FEATURE_SEAMLESS_BZ2)
  53 +        || (ENABLE_FEATURE_SEAMLESS_XZ)
  54 +       ) {
  55 +               setup_unzip_on_fd(fd, /*fail_if_not_detected:*/ 1);
  56 +       }
  57
  58         return fd;
  59  }